import Vue from 'vue'
import VueRouter from 'vue-router'

const Login = () => import( /* webpackChunkName: "Login_Home_Welcome" */ '../components/Login.vue')
const Home = () => import( /* webpackChunkName: "Login_Home_Welcome" */ '../components/Home.vue')
const Welcome = () => import(/* webpackChunkName: "Login_Home_Welcome" */ '../components/Welcome.vue')
const Users = () => import(/* webpackChunkName: "Users_Rights_Roles" */ '../components/user/User.vue')
Vue.use(VueRouter)

const routes = [{
    path: '/',
    redirect: '/login'
  },
  {
    path: '/login',
    component: Login
  }, {
  path: '/home',
    component: Home,
    redirect: '/Welcome',
    children: [
      { path: '/home', component: Welcome},
      {
        path: '/users', component: Users
    }]
  }
]

const router = new VueRouter({
  routes
})
// 挂载路由导航守卫,to表示将要访问的路径，from表示从哪里来，next是下一个要做的操作 next('/login')强制跳转login
router.beforeEach((to, from, next) => {
  // 访问登录页，放行
  if (to.path === '/login') return next()
  // 获取token
  const tokenStr = window.sessionStorage.getItem('token')
  // 没有token, 强制跳转到登录页
  if (!tokenStr) return next('/login')
  next()
})

export default router
